Connector Types; Aui - Cabletron Systems 100BASE-FX Cabling Manual

Connector Types

AUI

AUI cabling is always connected with DB15 ports and connectors. The use of any
other type of connector for AUI cable is a violation of the IEEE 802.3 specification
and is considered nonstandard.
DB15
The DB15 connector (male or female) provides 15 pins or channels (depending on
gender). For identification, these pins are numbered from 1 to 15. To identify the
number of a pin, look at the front of the connector, holding the DB15 as shown in
Figure 4-8, below, keeping the longer edge of the D-shaped connector up.
Channel #15
Female
The channel located at the upper right-hand corner of the female DB15 connector
is identified as channel 1. The numbering continues across the top of the
connector, to channel 8 at the upper left-hand corner. The channels from 9 to 15
are the seven channels at the bottom of the connector, from the lower right-hand
corner (9) to the lower left-hand corner (15). The male DB15 connector reverses
the left-right order of numbering, placing pin 1 at the upper left-hand corner, then
following the path across and down to pin 15 at the lower right-hand corner.
The wires of an AUI cable are connected to different locations (pins or channels)
of the male and female DB15 connectors. The differing organizations are called
"pinouts." The standard Ethernet DB15 pinout is discussed below.
Connector Types
Pin #1
Channel #1
Figure 4-8. DB15 Connectors
Ethernet Media
Pin #15
Male
1845n08
4-17